物理化学学报 >> 1994, Vol. 10 >> Issue (08): 728-732.doi: 10.3866/PKU.WHXB19940812

研究简报 上一篇    下一篇

烷基黄原酸合钴(III)与二丙胺第三步反应动力学

单金缓, 凌芹, 王安周   

  1. 河北大学化学系,保定 071002
  • 收稿日期:1993-02-11 修回日期:1993-07-26 发布日期:1994-08-15
  • 通讯作者: 单金缓

Kinetics of Reactions of Alkylxanthatocobalt(III) with Dipropylamine in Methanol

Shan Jin-Juan, Ling Qin, Wang An-Zhou   

  1. Department of Chemistry,Hebei University,Baoding 071002
  • Received:1993-02-11 Revised:1993-07-26 Published:1994-08-15
  • Contact: Shan Jin-Juan

关键词: 烷基黄原酸合钴(III), 二丙胺, 第三步反应动力学

Abstract:

The title reactions with R=Me, Et, n-Pr were studied in a temperature range of 298-313K by spectrophotometry. It was found that the rate with respect to [complex] is unity and that to [amine] is fractional. A linear relationship between [amine]/kobs and [amine] was observed, where kobs stands for pseudo-first-order rate constant. The rate increases with the increase in water content of the solvent. A mechanism involving a preequllibrium of an adduct formation between the complex and amine was proposed. The equation derived from the mechanism explained all the experimental results and the preequllibrium constants, rate constants of the rate-determing step along with the activation parameters were evaluated.

Key words: Alkylxanthatocobalt(III), Dipropylamine, Kinetics of reactions